FG0501 Electric Fuel Pump Module Assembly For Nissan Altima 2002-2003 (2.5L L4/3.5L V6) Engine 2.5L/3.5L/L4/V6

Extended cranking, low measured fuel pressure, hesitation under load, intermittent stalling, or an inaccurate fuel gauge can indicate an in-tank module fault after the fuse, relay, power supply, ground, wiring, and fuel lines have been tested. This FG0501 replacement module is intended for specified 2002–2003 Nissan Altima gasoline applications with the 2.5L L4 or 3.5L V6. Confirm the engine, emissions configuration, OE number, five-terminal connector, single quick-connect outlet, flange, module height, sender arm, and tank layout before ordering.

Fuel Pump Module Fitment for 2002–2003 Nissan Altima

This complete in-tank fuel pump module is organized for specified 2002 and 2003 Altima Base, S, SL, and SE configurations. Similar modules can differ by connector, outlet, regulator, fuel-level sender calibration, seal provision, or tank depth even when the vehicle year and engine appear correct.

Fitment Verification

• Confirm the 2002 or 2003 model year and the 2.5L L4 or 3.5L V6 gasoline engine.
• Match FG0501 or the verified Nissan 17040-8J000, 17040-8J005, 17040-8J00A, or 17040-8J00B reference.
• Compare the five-blade electrical connector, one 3/8-inch quick-connect outlet, flange, reservoir, module height, and float-arm direction.
• Verify the tank seal requirement because the standard FG0501 configuration is commonly supplied without a seal or lock ring.

Module Functions and Included Components

• Electric in-tank pump supplies fuel to the engine-side delivery system.
• Integrated pressure regulator, reservoir, and inlet strainer support fuel pickup and pressure control.
• Fuel-level sender and float arm report tank level to the instrument cluster.
• The verified configuration does not include a fuel-tank pressure sensor.

Symptoms and Diagnostic Checks

Measure fuel pressure before replacing the module. Test voltage and ground at the connector under load, inspect the fuse and relay, and check for restricted lines or tank contamination. A damaged sender circuit, corroded terminals, injector fault, ignition problem, or engine-control issue can create similar symptoms.

Installation Notes

Relieve fuel-system pressure and disconnect the battery before opening the tank. Clean the tank and flange, install the correct new seal where required, keep the float arm clear, and secure the module evenly. Prime the system, inspect the flange and outlet for leaks, measure fuel pressure, and confirm normal gauge operation.